HTTP 500 ERROR: Site is currently unable to handle this request

After I uploaded my index.php and my config.php, I started getting HTTP 500 errors, saying:

This page isn’t working
uls.unaux.com is currently unable to handle this request.
HTTP ERROR 500

I have no idea what could have caused this, so all help is appreciated. Thank you!
For reference: my site is uls.unaux.com .


Update:
~I found the issue. Naturally, it was a missing bracket. x( Thank you for all who answered!

Thank you for your response! Unfortunately, every page that I know works will not show up. Just to make sure, however, I created example.html, which is only:

<html>
<head>
<title>Example Page</html>
</head>
<body>
<h1>Welcome to my page</h1>
</body>
</html>

(http://uls.unaux.com/example.html )
However, while the page doesn’t display an error, nothing shows up.
I did not check the config file. Thanks! I will keep you posted. Thanks again for your response!

(mm) Thanks! I’m embarrassed that I missed that… Thank you for your answer, it helped me solve the issue. Thank you so much!